The Champions League quarter-final between Internazionale and their city rivals Milan was abandoned last night after the Rossoneri goalkeeper Dida was struck by a flare thrown from the stands in the 73rd minute.
The German referee Markus Merk took the players off the pitch after the Inter supporters began hurling plastic bottles and then over 30 flares on to the penalty area below them after Esteban Cambiasso had a header disallowed.
The Brazil international Dida received medical treatment to his shoulder while the Inter players urged their fans to stop hurling objects on to the pitch.
Milan were leading 1-0 after a first-half goal from Andriy Shevchenko which had put them 3-0 up on aggregate after they won last week's first leg 2-0.
Merk attempted to restart the game but in the end he took both sets of players off.
Meanwhile, Police in Turin have been put on maximum alert for tonight's Champions League match between Juventus and Liverpool, amid continuing concern that Italian hooligans are planning violent attacks on English supporters.
Throughout today 1,000 officers will be on duty at the Stadio delle Alpi and patrolling the city centre to thwart threats from Italian Ultras to take revenge on the visitors for the 1985 Heysel disaster in which 39 Juventus supporters died after English hooligans rioted.
The head of the city's undercover police, Giuseppe Petronzi, admitted that his greatest concern was containing events during the day in the city centre's many narrow side streets and small squares.
In a rare public statement he told the Turin sports daily Tuttosport: "We can't close down a city of 1.5 million people, but we are advising English supporters to stay in groups and not to stray from the city centre and not to rise to any provocations." The sale of alcohol has been banned for the day but this measure is often flouted.
At last week's first-leg Juventus fans turned their backs on a banner declaring "Memory and Friendship".
INTER MILAN: Toldo, Cordoba, Javier Zanetti, Favalli, Materazzi, Cristiano Zanetti, Van der Meyde, Veron, Gonzalez, Cambiasso, Adriano. Subs: Carini, Mihajlovic, Ze Maria, Karagounis, Cruz, Martins, Vieri.
AC MILAN: Dida, Cafu, Maldini, Nesta, Stam, Seedorf, Pirlo, Ambrosini, Shevchenko, Crespo, Kaka. Subs: Abbiati, Kaladze,Pancaro, Rui Costa, Serginho, Brocchi, Tomasson.
Referee: M Merk (Germany)
